Élise Théorêt

Lawyer - Montréal

Québec Bar 2014
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Élise Théorêt is a lawyer in the litigation group in Langlois Lawyers’ Montréal office. Her practice is diverse and incorporates civil, penal and administrative litigation, as well as advice on environmental law issues.

Élise is mainly involved in litigation matters in environmental law for private and parapublic companies. She represents clients in civil actions for contaminated lands, historical migration of contaminants, hidden defects, neighbourhood disturbances, injunctions and claims for damages.

She defends clients in penal actions at the federal, provincial and municipal levels, in proceedings instituted pursuant to the Fisheries Act, the Canadian Environmental Protection Act and the Environment Quality Act. Élise represents clients who apply for the review of monetary administrative penalties. She has appeared before the Court of Québec and the Superior Court, in addition to having participated in the preparation of motions filed in the Court of Appeal of Québec and the Supreme Court of Canada.

Élise provides environmental counselling, in the field of pulp and paper, residual hazardous waste, factory manufacturing and processing, remediation of contaminated lands and mining. She also advises clients with regards to potential civil, penal and administrative liability.

Élise frequently writes articles dealing with water protection and natural resources in Québec and has presented numerous conferences, notably on the potential liability of environmental consultants, and on the general principles of environmental law.


Master, Environmental Management, Centre universitaire de formation en environnement et développement durable, Université de Sherbrooke, 2015

Bachelor of Laws, Université de Montréal, 2012

Rankings & Recognitions

Group SM scholarship Recipient awarded for application excellence, 2014

Renewable Undergraduate Hospitality Scholarship Recipient, Université de Montréal, 2009-2012

Law Faculty Admission Scholarship Recipient, Université de Montréal, 2009

Representative Work

Claim for historical land contamination. Successful in obtaining the partial dismissal of an application for damages for environmental rehabilitation costs of nearly $300,000, of a property that formerly belonged to an agricultural cooperative, due to the prescription of the claim.

Injunction and damages claim for the failure to comply with a servitude. Successful in obtaining conclusions for individuals with regards to their neighbour’s failure to comply with their servitude of the right of passage, light and view.

Review of an Environmental Protection Compliance Order issued by Environment and Climate Change Canada. Requests by an automotive refinishing product company and its officer, to the Environmental Protection Tribunal of Canada, to review an Environmental Protection Compliance Order, which resulted in the amendment of the Compliance Order.

Environmental counselling for a pulp and paper company. Counselling with regards to a discharge of contaminated water on the company’s property, as well as the management of its atmospheric emissions.




Other Publications

2022 – “Sols contaminés et matières résiduelles – À propos des nouvelles exigences réglementaires“, Constas, no 59, Printemps 2022, coauthor Camille Chapdelaine.

2016 – “Le Règlement sur les carrières et sablières : l’interprétation des droits acquis” (Regulations on quarries and sandpits: interpreting acquired rights, in French), Vecteur environnement, Vol. 49, N° 3, p. 28-29, co-authored with Paul Granda.

2016 – “Passif environnemental des municipalités – Les obligations légales potentielles” (Municipal environmental liabilities – Potential legal obligations, in French), Vecteur environnement, Vol. 49, N° 1, p. 20-22, co-authored with Paul Granda.

2014 – “Les hydrocarbures : vision globale, sécurité des citoyens, protection de l’environnement et rentabilité économique au menu » (Oil and gas: the big picture, emergency management, environmental protection and economic viability on the menu, in French), Vecteur environnement, Vol. 47, N° 4, p. 32-33, co-authored with Paul Granda.

2014 – “Règlement sur le prélèvement des eaux et leur protection : intégrité et protection des sources d’eau potable” (The regulation on water catchment and protection: keeping drinking water sources safe, in French), Vecteur environnement, Nol. 47, N° 5, p. 28-29, co-authored with Paul Granda.

2014 – “Natural Resources: Recent Developments in Quebec”, Environment Law, Federated Press, Vol. XII, N° 2, p. 727-732, co-authored with Paul Granda and Mariko Maya Khan.

2014 – “Protecting Drinking Water”, Environment Law, Federated Press, Vol. XII, N° 3, p. 734-737, co-authored with Paul Granda.

2013 – “Le projet de règlement sur le prélèvement des eaux et leur protection : Une autre étape vers l’atteinte des objectifs de la Loi sur l’eau” (The Bill on water catchment and protection: Another step towards reaching the goals of water legislation, in French), Vecteur environnement, vol. 46, n° 5, p. 32-33, co-authored with Paul Granda.



2017-2019 – Potential liability of environmental consultants, Université de Sherbrooke, CUFE

2017 – Introduction to Environmental Law in Québec, Young Bar of Montréal, co-presented with Christian Immer, May.


2021 – President (since May 2021), Vice-president (September 2020 to May 2021), Administrator, Ville en vert

2017-2019 – Administrator and member of the fundraising committee, QuébecOiseaux

2010-2011 – Research for the drafting of “Un état des lieux du droit” (An inventory of law), Pro Bono

Professional Associations

Member of the Quebec Association for the Production of Renewable Energy (AQPER) 

Member of the Quebec Business Council on the Environment (CPEQ)

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